摘要:
超声波马达作为一种新型的小马力电机已引起科研人员的极大关注.本文中,作者利用解析法建立了行波型超声波马达定于齿的运动学模型,这对进一步研究转子与定子间的接触模型是至关重要的.同时,我们采用有限元法研究了马达在各阶振动模式下接触点位移、马达共振频率与齿高的变化规律,发现齿高在从3mm到9mm的区间变化时,对接触点圆周方向的位移影响较大,特别是在高阶(9,0)振动模式下,而径向位移在齿高6mm左右时基本趋于饱和。我们依据齿的运动数学模型研制出一种新型的三维接触式超声波马达.
Abstract:
Ultrasonic motors,as a fractional horsepower motor of new type,have attracted scholars'attention.Inthis paper,we have developed a motion modeling of projection-teeth of traveling wave ultrasonic motors,which issignificant for an expansion of interface modeling between the rotor and stator.At the same time,relationship betweenteeth height and displacement of a contact point,resonant frequency,is obtained by using the Finite Element Method (FEM) corresponding to various vibration modes.It is found that teeth height,from 3 mm to 9 mm,has great impacton displacement along circumferential direction,specially for (9,0) vibration mode,while displacement along radialdirection tends to saturation for teeth height of about 6 mm.Based on the motion modeling of projection-teeth,wefabricated an ultrasonic motor with 3-D interface of new type.
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